Collapsible core



Dec. 28,1926. 1,612,787

W. C. STEVENS I coLLAPsIaLs cons Filed Sept. 25. 1924 s-shgets-sheet 1 I INVENTOR. VV/LL/HN 6. STEVE/vs BYOFCK A TT GENE Y.

Dec. 28. 1926. 1,612,787

w. c. STEVENS 1 COLLAPSIBLE cont:-

Filed Sept. 23, 1924 :5 Sheets-Sheet a INVENTOR.

VV/LL/HM CI Srzvzws ATTORNEY.

Dec. 28 1926.

W. C. STEVENS COLLAPSIBLE GORE Filed Sept. 23. 1924 3 Sheets-Sheet 5 ATTORNEY.

Patented Dec. 28, 1926.

; "warren STATES PATENT ON, 0310, ASSIGNOR TO THE FIRESTQNE TIRE AND F AKRON, OHIO, A CORPORATION OF OHIO.

'WILLTAM C. STEVENS, OF

RUBBER COMPANY,

AKR

coLLArsrBLE CORE.

Application filed September 23, 1924. Serial No. 789,319.

The chief object of'the invention is to provide an improved collapsible core construction in which a plurality of core sections are permanently connected together on a tire buildlng machine and are adapted to be readily collapsed so that acasing may be removed and p invention is directed toward completed tire articularly the the improvement of collapsible core structure whereby they will permit the ready of large section, such as, from.

removal of tires balloon tires, there The above and other objects will become more readily apparent as the scription is read in connectio companying drawings,

following den with the acit being understood that the invention is not limited by the specific form thereof shown and described.

Of the accompanying drawings,

Figure 1 is a constructed according to the shown in non-collapsed Figure 2 shown in partly collapsed condition.

Figure 3 partly Figure 2; and

Figure core in completely collapsed Referring to the drawings, prises opposite key sections with ends 11, 11 which of the core to permit drawing inwardly from the core circle.

front elevation of a core invention and condition. is afront elevation of the core Figure 1 showing the same 1n.

is a vertical diametral section in elevation of the core as shown 1n 4 is a similar view showing the condition.

the core com- 10, formed converge outwardly of the sections Between the key sections 10 are opposite hinged sections 12, 12. The sections 12 are ends 13. 13

11, the latter provided with adapted to mate with the ends being provided with keys 14 adapted to travel in keyways 15 formed in the ends 13.

The sections 10 are mounted on. rack bars 16, 16 provided with they are arranged to slide in a grooves 17 by which slot 18 on ribs 19, 19 formed on a chuck 20, the latter being preferably the former being secured on formed in two parts 20 and 20",

a drive shaft,

(not shown) and the latter being bolted to the former to provide the slot 18, a gear 21 is rotatably mounted on the chuck 20 so as to rotate in slot 18 and to mesh with racks 16, 16 a suitable device for gear being provided by rotating said securing the same on a shaft 22 having a non-circular head 23 adapted to enter a correspon ding socket in rack bars 16 whereby the latter may extend into the interior of the opposite sections 10 when the latter are drawn together as illustrated in Figure 2. Thus core sections 10 may be drawn inwardly into abutting rela' tion to the bracket 20.

Core sections 12 are hinged onto links 25, which are formed with portions so ofiset from the plane of the core that the links may in turn be hinged onto the outer portion of chuck section 2O as shown at 26, 26. Sections 12 are thus adapted to be swung out of the plane of the core into abutment with each other, as illustrated in Fig. 4 and if desired, to be further swung on the links 25 until the sections lie in abutting relation in parallel planes.

In operation, the core being in the condi tion shown in Figure 1, plies of fabric, beads etc. are applied thereto in the usual manner to form the carcass of a tire. When the tire is complete and ready for removal, a crank is applied to head 23 and rotated; This rotates gear 21 which operates racks 16 in opposite direction and draws sections 10 inwardly until they are stopped by the chuck 20, the racks 16 apertures 24 and when the sections 10 are completely withdrawn, the racks extend into the sections 10 as illustrated in Figure 2. Sections 12 are then swung on links 25 which permit the sections to swing while remaining in a plane parallel to the core so that the carcass supported thereon is drawn over the sections 20 and can then be drawn from the sections 12. The sections 12 are then swung back into the position shown in Figure 2 and the gear 21 is rotated in the reverse direction to cause sections 10 to again take up their positions in the core circle. I

Modifications of the invention may be resorted to without departing from the spirit thereof or the scope of the appended claims.

What I claim is:

1. In a collapsible core construction, the combination of oppositely disposed key sections, bars fixedly connected to the key sections, a chuck at the axis of the core in which said bars are slidably mounted, said key sections each having an aperture therein adapt- (ill in the meantime enter the ed to receive the bar connected to the opposite section, and a link pivotedto the central. plate and also pivoted to an intermediate core section. I

2. In a collapsible core construction, the coinbination'of key sections, bars fixedly connected to said key sections to guide same to ward and from the center of the core, said key sections each having an aperture therein adapted to receive the bar connected to the oppos te section and intermediate sections located between thekey sections and'having pivotal connections at the center of the core.

3. In a collapsible core construction, the

combination of oppositely disposed key sections, bars fixedly connected to the key sections, at chuck on which the bars are slidably mounted, and means for simultaneously op erating the bars in opposite direction to withdraw the sections 'from'or return them to the core circle, each of said sections hav ing an aperture therein in alignment with the bar connected to the other section, whereby the bars can enter the apertures to permit the sections to collapse into abutting relation with the chuck.

WILLIAM C. STEVENS. 

